自定义ToastUtils

Posted 2021-06-08 天耀106

第二节：自定义ToastUtils

import android.annotation.SuppressLint
import android.content.Context
import android.view.Gravity
import android.view.LayoutInflater
import android.view.View
import android.widget.TextView
import android.widget.Toast
import com.tian.yao.R

@SuppressLint("StaticFieldLeak")
object ToastUtils {

    private var toast: Toast? = null
    private var toastView: View?=null
    private var tvText: TextView?=null

    /**
     * 第一次时间
     */
    private var oneTime: Long = 0

    /**
     * 第二次时间
     */
    private var twoTime: Long = 0

    /**
     * 之前显示的内容
     */
    private var oldMsg: String? = null

    private var mContext:Context?=null

    fun init(context: Context?){
        mContext = context
    }

    fun showShortText(message: String){
        if(mContext ==null){
            return
        }
        showShortText(mContext, message)
    }

    /**
     * 显示Toast
     *
     * @param context
     * @param message
     */
    fun showShortText(context: Context?, message: String) {
        if (toast == null) {
            toastView = LayoutInflater.from(context).inflate(R.layout.toast_text,null)
            tvText = toastView?.findViewById<TextView>(R.id.tv_text)
            tvText?.text = message
            toast = Toast(context)
            toast?.setGravity(Gravity.CENTER, 0, 0)
            toast?.duration = Toast.LENGTH_SHORT
            toast?.view = toastView
            toast?.show()
            oneTime = System.currentTimeMillis()
        } else {
            twoTime = System.currentTimeMillis()
            if (message == oldMsg) {
                if (twoTime - oneTime > Toast.LENGTH_SHORT) {
                    toast!!.show()
                }
            } else {
                oldMsg = message
                tvText!!.text = message
                toast!!.show()
            }
        }
        oneTime = twoTime
    }
}

布局文件：toast_text

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="center"
    android:background="@drawable/shape_toast">

    <TextView
        android:id="@+id/tv_text"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:paddingStart="28dp"
        android:paddingTop="11dp"
        android:paddingEnd="28dp"
        android:paddingBottom="11dp"
        android:text="测试!"
        android:textColor="@color/white"
        android:textSize="14sp" />
</LinearLayout>

drawable文件：

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="140dp"
    android:layout_height="42dp"
    android:shape="rectangle"
    tools:ignore="MissingDefaultResource">

    <solid android:color="#FF6D6D6D" />
    <corners android:radius="8dp" />

</shape>

App初始化：

import android.app.Application
import com.tian.yao.two.ToastUtils

class App :Application() {

    override fun onCreate() {
        super.onCreate()
        ToastUtils.init(this.applicationContext)
    }
}

Activity调用：

import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import com.tian.yao.two.ToastUtils

class MainActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        ToastUtils.showShortText("测试")
    }
}

代码链接：

链接: https://pan.baidu.com/s/1aqpcuhVgIkCr2rfnDV_6ng 提取码: rrea 

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